<!-- Beginning of JavaScript -

function changeSign(button_obj) {

  if (!fixed(button_obj.name)) {
    if (button_obj.value != "  ") {
      if (button_obj.value == "$$")
        button_obj.value="/\\";
      else {
        if (button_obj.value == "/\\")
        button_obj.value="[]";
        else {
          if (button_obj.value=="[]")
            button_obj.value="\\/";
          else {
            if (button_obj.value=="\\/")
              button_obj.value="<:";
            else {
              if (button_obj.value=="<:")
                 button_obj.value=":>";
              else {
                if (button_obj.value==":>")
                  button_obj.value="( )";
                else {
                  if (button_obj.value=="( )")
                    button_obj.value="  ";
                }
              }
            }
          }
        }
      }
    }
    else
      button_obj.value="$$";
  }
}

function clear() {

  for ( count=0;  count < document.form.length; count++ )
    if ( !fixed( document.form.elements[ count ].name ) )
      document.form.elements[ count ].value = "  ";
}

function correct() {

  with (document) {
    with (form) {
      Cor = true;
      for ( count = 0; count < length; count++ )
        if ( giveValue( elements[ count ].name ) != elements[ count ].value)
          Cor = false;
    }
  }
  if ( Cor )
    alert( 'correct' );
  else
    alert( 'incorrect' );
}

function answer() {

  with ( document ) {
    with ( form ) {
      for ( count = 0; count < length; count++ )
        elements[ count ].value = giveValue( elements[ count ].name );
    }
  }
}
// - End of JavaScript - -->